How to forecast your bank account balance
Forecasting your bank balance means projecting what your account will hold on a future date, based on the money you expect to come in and go out between now and then. Done well, it answers the question that matters most: will I have enough to cover everything before my next paycheck? This guide explains the method, and how TallyMint does it for you automatically.
What a balance forecast actually is
A balance forecast starts with your current balance and walks it forward day by day. For each upcoming day, you add expected income (paychecks, deposits) and subtract expected expenses (rent, utilities, subscriptions, loan payments). The result is a projected balance for every day in the period, usually shown as a line that rises on paydays and steps down as bills hit.
The manual way
You can do this by hand in a spreadsheet:
- List every recurring bill and its due date for the next 30 to 90 days.
- List expected income and the dates it lands.
- Start with today's balance, then add and subtract each item in date order.
- Track the running total so you can see the lowest point it reaches.
This works, but it is tedious to maintain. Every time a bill amount changes, a payday shifts, or you add a new subscription, you have to update the sheet, and it is easy to forget something.
The automatic way with TallyMint
TallyMint was built around this exact problem. You enter your recurring bills and income once, with their amounts and schedules, and TallyMint projects your balance forward automatically:
- Pick a horizon: 30, 60, or 90 days.
- TallyMint charts your projected balance day by day, using your recurring items plus anything already in your register.
- It highlights the lowest balance you will hit in the period, so you can spot a shortfall before it happens.
- Recurring bills can auto-enter on their due dates, so the forecast stays accurate without manual upkeep.
Instead of rebuilding a spreadsheet every month, you glance at a chart and immediately see whether the next few weeks are comfortable or tight.
Why this is worth doing
A balance forecast turns "I think I'm okay" into "I know I'm okay until the 27th, when it gets tight." It is the difference between reacting to an overdraft and seeing it coming a month out. For anyone living between paychecks, or just trying to time a large purchase, it is the single most useful thing personal finance software can do.